Subheading 2932.99 · Section VI
Heterocyclic compounds; with oxygen hetero-atom(s) only, no lactones or unfused furan rings in the structure, other than isosafrole, 1-(1,3-benzodiaxol-5-yl) propan-2-one, piperonal, safrole, tetrahydrocannabinols (all isomers), carbofuran (ISO)
Source: Harmonized System 2022 edition (World Customs Organization), from the UN Comtrade classification list.